8" eTape Liquid Level Sensor + extras
The eTape Liquid Level Sensor is a solid-state sensor with a resistive output that varies with the level of the fluid. It does away with clunky mechanical floats, and easily interfaces with electronic control systems. The eTape sensor`s envelope is compressed by the hydrostatic pressure of the fluid in which it is immersed. This results in a change in resistance that corresponds to the distance from the top of the sensor to the surface of the fluid. The sensor`s resistive output is inversely proportional to the height of the liquid: the lower the liquid level, the higher the output resistance; the higher the liquid level, the lower the output resistance.
This is a very unique sensor, we haven`t seen anything else that is affordable and accurate for measuring liquid level. This sensor seems like it would be a handy addition to an hydroponics, aquarium, fountain or pool controller, or perhaps measuring a rain tube. This particular sensor is the 8" model, Adafruit also included a 4-pin connector and 560 ohm resistor. The connector is so you don`t have to solder directly to the delicate pins: instead, just solder to the connector and plug it onto the sensor.
Since the sensor is resistive, it is easy to read it using a microcontroller/Arduino ADC pin.
- Sensor Length: 10.1" (257 mm)
- Width: 1.0" (25.4mm)
- Thickness: 0.015" (0.208 mm)
- Resistance Gradient: 140Ω / inch (56Ω / cm), ± 10%
- Active Sensor Length: 8.4" (213 mm)
- Substrate: Polyethylene Terephthalate (PET)
- Sensor Output: 1500Ω empty, 300Ω full, ± 10%
- Actuation Depth: Nominal 1 inch (25.4 mm)
- Resolution: 0.01 inch (0.25 mm)
- Temperature Range: 15°F - 140°F (-9°C - 60°C)